Usage: AuditPol /clear /y This command deletes per-user audit policy for all users, resets system audit policy for all subcategories ...

Usage: AuditPol /clear [/y] This command deletes per-user audit policy for all users, resets system audit policy for all subcategories and sets all the auditing options to disabled. 
 Options   /?               Help (context-sensitive).   /y               Suppresses the prompt to confirm if all the audit policy                    should be cleared. 
 Example:    auditpol /clear   auditpol /clear /y